android,Dockerfile: bump NDK, Gradle

Nix support is easier to do with recent NDK and Gradle dependencies.
Bump them here, and add Nix support in a follow-up.

Signed-off-by: Elias Naur <mail@eliasnaur.com>

Dockerfile

@@ -26,7 +26,7 @@ RUN unzip sdk-tools-linux-3859397.zip
 RUN echo y | $ANDROID_HOME/tools/bin/sdkmanager --update
 RUN echo y | $ANDROID_HOME/tools/bin/sdkmanager 'platforms;android-31'
 RUN echo y | $ANDROID_HOME/tools/bin/sdkmanager 'extras;android;m2repository'
-RUN echo y | $ANDROID_HOME/tools/bin/sdkmanager 'ndk;20.0.5594570'
+RUN echo y | $ANDROID_HOME/tools/bin/sdkmanager 'ndk;23.1.7779620'
 RUN echo y | $ANDROID_HOME/tools/bin/sdkmanager 'platform-tools'
 RUN echo y | $ANDROID_HOME/tools/bin/sdkmanager 'build-tools;28.0.3'
 

android/build.gradle

@@ -4,7 +4,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.6.0'
+        classpath 'com.android.tools.build:gradle:4.2.0'
     }
 }
 
@@ -21,6 +21,7 @@ allprojects {
 apply plugin: 'com.android.application'
 
 android {
+    ndkVersion "23.1.7779620"
     compileSdkVersion 30
     defaultConfig {
         minSdkVersion 22

android/gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionSha256Sum=038794feef1f4745c6347107b6726279d1c824f3fc634b60f86ace1e9fbd1768
+distributionSha256Sum=3239b5ed86c3838a37d983ac100573f64c1f3fd8e1eb6c89fa5f9529b5ec091d
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.7.1-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists